DS1602 - Maxim Integrated

DS1602 Elapsed Time Counter

RST CLK - Reset - Clock DQ - Data Input/Output GND - Ground X1, X2 - Crystal Inputs DESCRIPTION VBAT VCC - + Battery Input - +5V The DS1602 is a real-time clock/elapsed time counter designed to count seconds when VCC power is applied and continually count seconds under battery backup power with an additional counter regardless of the condition o.

Features

§ Two 32-bit counters keep track of real-time and elapsed time § Counters keep track of seconds for over 125 PIN ASSIGNMENT RST 1 DQ 2 8 VCC 7 X1 years § Battery powered counter counts seconds from the time battery is attached until VBAT is less than 2.5V § VCC powered counter counts seconds while VCC is above VTP and retains the count in the absence of VCC under battery backup power § Clear function resets selected counter to 0 § Read/write serial port affords low pin count § Maximum current drain of less than 1 µA from VBAT pin when serial port is disabled § One byte protocol defines rea.